A KT-link buffer clone supporting JTAG Serial Wire Debug is now available for Bus Blaster v2 pre-release testers. This should support the new 2-wire SWD debugging protocol when available in OpenOCD and urJTAG. The KT-link is the first FT2232-based JTAG debugger with support for the new SWD and SWV JTAG interface used on low pin […]
Tag Archives: JTAG
LibSWD: JTAG serial wire debug library
libswd is an open source library for the new 2-wire JTAG protocol called Serial Wire Debug. The developer is currently working to integrate it with OpenOCD and urJTAG. Most open source projects supporting SWD seem to be standardizing on the KT-link style FT2232 programmer. The CPLD on Bus Blaster v2 can imitate the KT-link buffer, […]
Bus Blaster v2 testing
We’ve just completed verification of the Bus Blaster v2 JTAG debugger. V2 is much more flexible than v1, and uses a programmable logic chip (CPLD) for the buffer. The logic chips in v1 were expensive to source and place, but v2 uses a $1 CPLD with a bunch less pins to solder and inspect. Bus […]
Week in (p)review: August 22, 2010
Here’s some highlights from the past week, in case you missed them: Dynamic Sampling depths on the Logic Sniffer! Continued development on an USB LCD backpack and a computer controlled voltage/current source/sink. You’re welcome to get involved too. An updated Bus Blaster design was posted. Bus Pirate v4 was assembled and tested. There are some […]
Inexpensive multi-programmer update
An update of the inexpensive, medium-speed AVR/PIC/CPLD/Arduino programmer is posted in the forum. This programmer is designed for people who don’t own a programmer, and just want to rescue a bricked PIC or AVR. This version takes into account the pin connection diagram MichaelZ outlined during our last design review. The update has a single […]
Bus Pirate JTAG
The Bus Pirate can be used as an ARM JTAG debugger with OpenOCD. Joby Taffey set up the OpenOCD/Bus Pirate tool chain, and used it to work with a Stellaris LM3S9B90 (ARM Cortex-M3). Get a Bus Pirate for $30, including worldwide shipping at Seeed Studio. Adafruit also has the Bus Pirate and probe cables in […]
Bus Pirate OpenOCD walk-through
Jrt posted some notes about using the Bus Pirate with OpenOCD: It does work – but it’s not slick or fast. If you want a cheap JTAG adapter for remote debugging or big flash writes, get an FTDI-2232 based one. But, it’ll be fine for fiddling with bootloaders or just interrogating hardware. We agree that […]
Bus Blaster: High speed USB to JTAG, SPI, UART
The Bus Pirate can program flash chips with flashrom and debug JTAG devices with OpenOCD, but it doesn’t do these things very fast. It was designed for human-speed interaction. The Bus Pirate is a good way to learn an EEPROM chip, but you eventually integrate the chip in a real circuit with actual code. In […]
Bus Pirate OpenOCD JTAG how-to
Michal Demin posted a tutorial for the OpenOCD JTAG debugging support he added to the Bus Pirate. Some time ago, I have added support to OpenOCD to be able to use Buspirate as JTAG interface. This how-to will show you, how to setup all the things necessary. Things you will need: – Buspirate – Computer […]
Bus Pirate: OpenOCD (JTAG) firmware port v00
A Bus Pirate v2go/v3 port of the OpenOCD JTAG debugger source code from USBPROG is complete. You can download the source and latest compile from the OpenOCD folder in the project SVN. Firmware is only half of the equation though, OpenOCD doesn’t yet support the USBPROG protocol over a (virtual) serial port like the Bus […]
Bus Pirate OpenOCD (JTAG) support update
OpenOCD is a popular open source JTAG utility. Zach Welch, a regular contributor to the project, has offered to help add Bus Pirate support.You can follow the progress in his git repository. The current plan is to port the excellent work done by the USBPROG project to the Bus Pirate. Here are some tentative goals: […]
USBprog
USBprog is an open source multi-chip programmer. It currently programs AVRs with an ISP mkII clone, does JTAG debugging with OpenOCD, and some other stuff. We’re going to take a close look at the source and protocol used with OpenOCD to see if it can be implemented in the Bus Pirate. Thanks for the tip […]
Bounty: Add Bus Pirate support to OpenOCD JTAG programmer
We’re offering a bounty on the most-requested Bus Pirate features. The developer of each feature can have their choice of a Bus Pirate probe cable kit or our next monthly project. Today we’re highlighting JTAG. It would be ideal to have Bus Pirate support in the popular open source JTAG programmer OpenOCD, but other solutions […]
Bus Pirate: Chip demonstrations
Here’s a comprehensive list of Bus Pirate chip demonstrations. It includes Ian’s old demonstrations from Hack a Day, and the most recent demos from Dangerous Prototypes. Tutorials are arranged by Bus Pirate hardware version. Bus Pirate v2&v3 Firmware v0g new feature demonstration PCF8563 real time clock calendar (I2C) ShiftBrite with A6281 3 channel LED driver […]